Encode and Decode Messages
Encode or Decode the Given Message $\mathrm { A } = \left[ \begin{array} { r r r } 1 & 1 & 1 \\ - 1 & 1 & 2 \\ 1 & 2 & 3 \end{array} \right]$

question 89

Multiple Choice

Encode and Decode Messages
Encode or decode the given message, as requested, numbering the letters of the alphabet 1 through 26 in their usual
order.
-Use the coding matrix $\mathrm { A } = \left[ \begin{array} { r r r } 1 & 1 & 1 \\ - 1 & 1 & 2 \\ 1 & 2 & 3 \end{array} \right]$ and its inverse $\mathrm { A } ^ { - 1 } = \left[ \begin{array} { r r r } - 1 & - 1 & 1 \\ 5 & 2 & - 3 \\ - 3 & - 1 & 2 \end{array} \right]$ to decode the cryptogram $\left[ \begin{array} { l l l } 37 & 16 & 35 \\ 38 & 20 & 4 \\ 82 & 40 & 60 \end{array} \right]$ .

• A) GOOD_LUCK
• B) STAY_CALM
• C) LOOK_DOWN
• D) HELP_THEM

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Definitions:

Try-Catch-Throw Trio

This refers to the combination of using try and catch blocks along with a throw statement in exception handling, allowing for errors to be caught and possibly re-thrown for further handling.

Handling Exceptions

Handling exceptions involves writing code that responds to errors during program execution in a controlled manner, thereby preventing the program from crashing unexpectedly.

RuntimeException

A type of exception in programming that indicates errors that can occur during the execution of a program and are not checked by the compiler, such as division by zero or invalid array indexes.

Catch Or Declare Rule

A rule in Java that requires a method to either catch an exception with a try-catch block or declare it in the method's signature if it can throw checked exceptions.